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外部からVDDDを供給した場合、VBUS_IN_DISCHARGEは外部で切断してもよいでしょうか。
SHV RegulatorをOFFにしさえすればよいのでしょうか。
その時、VBUS_C_CTRLの電源供給源は何になりますでしょうか。
外部電源入力源に関係なくVBUS_C_MON_DISCAHRGEなのでしょうか。
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Is it possible to disconnect VBUS_IN_DISCHARGE externally when VDDD is supplied from the outside?
Is it all right if it only disable the SHV Regulator?
At that time, where is the power supply for VBUS_C_CTRL taken from?
Does VBUS_C_MON_DISCHARGE need to be supplied?
Solved! Go to Solution.
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Hello,
Yes, please dont connect VBUS_IN_DISCHARGE when you have VDDD connected to externally and disable the regulator.
All the I/Os will be powered form VDDD in that case including VBUS_C_CTRL. You could connect VBUS_C_MON_DISHARGE to the VBUS on the Type-C connector to monitor it. Please refer to Figure 9 in the datasheet for power bank application, it shows an example of the device being powered from VDDD when acting as a sink.
Best Regards,
Sananya
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Hello,
Yes, please dont connect VBUS_IN_DISCHARGE when you have VDDD connected to externally and disable the regulator.
All the I/Os will be powered form VDDD in that case including VBUS_C_CTRL. You could connect VBUS_C_MON_DISHARGE to the VBUS on the Type-C connector to monitor it. Please refer to Figure 9 in the datasheet for power bank application, it shows an example of the device being powered from VDDD when acting as a sink.
Best Regards,
Sananya
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Sananya-san,
Thank you for your reply.
If VBUS_IN_DISCHARGE connect external when it have VDDD supply, what is occured fatal problem?
It is connected to VBUS_IN_DIS at current board.
Thanks,
Tetsuo
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Hi Tetsuo-san,
If you connect both VDDD and VBUS_IN_DISCHARGE, you will be shorting the output of the internal regulator to your external supply and back powering it and it might damage the chip. When the external VBUS_IN_DISCHARGE is connected, the regulator generates 3.3V on the VDDD pin so it shouldnt be used as an input.
Best Regards,
Sananya
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Sananya-san,
Thank you for your reply again.
I understand.